An Evaluation of Bacillus Thuringiensis in Protecting Forests from Attack of the Spruce Budworm
Problem Addressed: Spruce Budworm
Goal(s)/Objective(s): Evaluate the efficacy of Bacillus thuringiensis and certain adjuvents in protecting the foliage of balsam fir and red spruce from attack of epidemic populations of the spruce budworm.
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- Dimond, John B.
University of Maine - Leonard, David E.
University of Maine
The philosophy of spruce budworm control in the northeastern United States has changed substantially in the last several years. When DDT could be used, emphasis was on suppression of budworm populations, and protection of tree foliage generally went along with this. While DDT applied at 1 lb/acre produced some damage to populations of fish, aquatic insects, and natural enemies of the budworm, it was held that the damage was tolerable in exchange for the lasting reductions in budworm numbers that were sometimes obtained.
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